C1
Nesco
Temperature Calibration Error
C1 or similar calibration code appears and the cooker will not start normal programs.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Out-of-range reading from bottom NTC sensor, Firmware calibration data corruption, Poor thermal contact between sensor and heating plate
How to Fix / Troubleshooting
Safety first: Unplug the cooker and let it cool completely.
- Clean sensor area: Remove the inner pot and clean the heating plate and central sensor area thoroughly. Ensure no residue is insulating the sensor.
- Check pot condition: Verify that the inner pot bottom is flat and not warped. Replace if deformed.
- Power reset: After cleaning, unplug the unit for 10–15 minutes, then plug back in to see if the code clears.
- Internal inspection (advanced): Remove the bottom cover and ensure the sensor is firmly attached to the plate and its wiring is intact.
- Service calibration: If the error persists, the unit may require a factory-level calibration or control board replacement.
Warning: Do not attempt to modify firmware or calibration data without manufacturer guidance.
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Repair Difficulty
Hard
4/5
Required Part
Bottom NTC Temperature Sensor Assembly
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